1 . The ratio of (1 kilogram/1 milligram) is a) 10^2 b) 10^3 c) 10^6 d) 10^-3 e) 10^-6 2 . The length of each side of a square is 4.0 m. What is the length of the diagonal of the square (shown as a dashed line in the figure)? 4.0 x 4.0 a) 2.8m b) 3.5m c) 5.7m d) 8.0m e) 16m 3 . Which statement is true concerning scalar quantities ? a) Scalar quantities must be represented by base units . b) Scalar quantities have both magnitude and direction . c) Scalar quantities can be added to vector quantities using rules of trigonometry . d) Scalar quantities can be added to other scalar quantities using rules of trigonometry . e) Scalar quantities can be added to other scalar quantities using rules of ordinary addition . 4 . Jamie's hair grows with an average speed of 3.5 x 10^-9 m/s. How long does it take for her hair to grow 0.3 m? Note: 1 year = 3.156 x 10^7 s . a) 1.9 yr b) l.3 yr c) 0.37 yr d) 5.4 yr e) 2.7 yr 5 . An object moving along a straight line is decelerating. Which one of the following statements concerning the object's acceleration is necessarily true ? a) The value of the acceleration is positive . b) The direction of the acceleration is in the same direction as the displacement . c) An object that is decelerating has a negative acceleration . d) The direction of the acceleration is in the direction opposite to that of the velocity . e) The acceleration changes as the object moves along the line . 6 . A projectile is fired at an angle of 60.0 above the horizontal with an initial speed of 30 m/s. How long does it take the projectile to reach the highest point in its trajectory ? a) 1.5s

This
preview
has intentionally blurred sections.
Sign up to view the full version.

b) 2.7s c)4.0s d)6.2s e)9.8s 7 . A crate with a weight of 225 N accelerates along a frictionless surface as the crate is pulled with a force of F = 14.5 N as shown in the drawing . What is the horizontal acceleration of the crate ? a) 1.4m/s2 b) 0.427 m/s2 c) 1.29 m/s2 d) O.597m/s2 e) 0.644 m/s2 8 . A 2400 kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 6.67 x 10^3 m/s. The radius of the circular orbit is 8.92 x 10^6 m. Determine the magnitude of the gravitational force exerted on the satellite by the planet . a) 1.2 x 104 N b) 2.4 x 1O4 N c) 5.0x103 N d) 7.5 x 10^-4 e) This cannot be determined since the mass and radius of the planet are not given . 9 . A rock is suspended from a string and moves downward at constant speed. Which statement is true concerning the tension in the string if air resistance is ignored ? a) The tension is zero . b) The tension points downward . c) The tension is equal to the weight of the rock . d) The tension is less than the weight of the rock . e) The tension is greater than the weight of the rock . 10

This is the end of the preview.
Sign up
to
access the rest of the document.